Extended Data Table 1: List of all events used in the spacecraft data analysis, including important parameters for each interval.

Intervals during which the MMS satellites were located in the quasi-parallel subsolar magnetosheath. The upstream interplanetary magnetic field (IMF) vector and cone angle are obtained either from the OMNI data set or directly from measurements from the ACE or Wind spacecraft propagated to the bow shock, depending on the data availability for each event. The IMF cone angle provides a good estimate of the shock θ_Bn angle upstream of MMS, because the spacecraft are located in the subsolar region. The magnetosheath wave period is obtained as the peak of the power spectral density of the magnetic field strength during the interval that is closest to the predicted foreshock wave period, given between parentheses. The last column provides the observed (predicted) foreshock wave period when MMS probed the foreshock shortly before or after the magnetosheath interval. Those events for which no data were available in the foreshock are marked with ‘-’. Note that the solar wind and IMF conditions somewhat differ between the magnetosheath and foreshock intervals, hence the slightly different wave periods, but which show good agreement with the predicted values.